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Discontinued · notice 2026-07-27

IRFI644GPBF

250V 7.9A N-Channel Power MOSFET, TO-220 FullPak (isolated tab)

The read
Discontinued under Vishay PTN-SIL-063-2026 after the Tower Semiconductor 6-inch fab line supporting it was terminated. The named replacement loses the isolated tab, so designs that depend on FullPak isolation cannot cross over cleanly. Authorized channel stock was already thin before the notice. LTB closes January 29, 2027.
ManufacturerVishay Siliconix
Lifecycle statusDiscontinued
Notice date2026-07-27
Last-time-buy2027-01-29
Last ship2027-07-29
CategoryPower MOSFET
How Sourcible handles this part
Remaining lots trade on the open market. Anything we source outside authorized distribution goes through an independent AS6081-accredited laboratory before it ships. You get tested parts and the report to prove it.
Possible alternates worth a conversation
IRF644PBF Vishay's named replacement, but it is a standard non-isolated TO-220. Not a drop-in for isolated-tab designs. Expect board rework or added isolation hardware.
Alternates are facts, not requirements. Your engineering decides; we verify stock before quoting one.

IRFI644GPBF frequently asked questions

Is IRFI644GPBF still available?

IRFI644GPBF is no longer in production. Vishay Siliconix discontinued it in a 2026-07-27 notice. The last-time-buy date was 2027-01-29. Final factory shipments ended 2027-07-29. Remaining lots may still exist outside authorized distribution, and Sourcible LLC locates and verifies that material on request.

Is IRFI644GPBF discontinued or end of life?

Yes. IRFI644GPBF is discontinued at Vishay Siliconix, announced in a 2026-07-27 notice. The last-time-buy date was 2027-01-29. Final factory shipments ended 2027-07-29.

What are the alternatives to IRFI644GPBF?

Documented possible alternates for IRFI644GPBF include IRF644PBF. Fit depends on the application and your engineering approval, and Sourcible LLC verifies real availability on an alternate before quoting it.

Where can I buy IRFI644GPBF now that it is obsolete?

IRFI644GPBF no longer ships from Vishay Siliconix production. Sourcible LLC sources remaining inventory of IRFI644GPBF for OEM and EMS buyers. Components sourced outside authorized distribution are inspected by an independent AS6081-accredited lab before shipment. Submit a requirement on this page to start.

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